Vibrating skip for concrete mixers



Jan. 7, 1930. s. SHAFER, JR

VIBRATING SKIP FOR CONCRETE MIXERS Filed Jan. 11, 1929 2 Sheeps-Sheet INVENTOR. amuel J/zafer; Jrr,

Jan. 7, 1930. s. SHAFER, JR

VIBRATING SKIP FOR CONCRETE mxsns Filed Jan- 11, 1929 2 Sheets-Sheet 2 I lllllll 1| d INVEN TOR.

fi R 6 M w 6 a m S Patented 7, 1930 UN-ITED s ra'ras PATENT orrlca SAMUEL SHAFER, JR, OI MILWAUKEE, .WISCONSIN, ASSIGNOR TO CHAIN BELT COM- PANY, OI MILWAUKEE, WISCONSIN, A CORPORATION OF WISCONSIN VIBRATING SKIP FOR CONCRETE MIXEBS Application filed January 11, 1929. Serial No. 331,911.

This invention relates to concrete mixers and more particularly to that type of mixer which comprises a rotatable drum which is adapted to be charged with aggregates by means of a pivoted skip and has for one of its objects to provide a simple and effective means whereby such loading sk'ip may be agitated or vibrated when in its discharging position to assist in the movement of the aggregates from the skip into the drum.

A further object of the invention is to'provide a skip vibrating means which will be simple in construction, comparatively inexpensive to manufacture and more efiicient in use than those which-have been heretofore proposed.

A still further object of the invention is to provide a skip vibrating means in whichthe skip will be vibrated only during the time it is in its discharging pos1tion, such vibration being accomplished through the rotary movement of the mixing drum.

With the above and other objects in view which will appear as the description proceeds, the invention consists in the novel details of construction and combinations of parts more fully hereinafter described and particularly pointed out in the appended claims.

Referring to the accompanying drawings forming a part ofthis specification in which like reference characters designate like parts in all the views:

Fig. 1 is a front elevational view of a concrete mixer of well known form with the present invention applied thereto.

Fig. 2 is a side elevational view of the parts shown in Fig. 1, and

Figs. 3 and 4 are enlarged fragmentary sec- -tional elevationalviews showing in detail the different positions assumed by the parts in the operation of the invention.

Referring more particularly to the said drawings there is shown a concrete mixer having a frame 10 in which is rotatably mounted' a mixing drum 11 which is'driven by an internal combustion engine or other prime mover 12 in the usual manner. The mixer is also, providedwith a loading sklp 13, the forward portion of which is provided with a saddle 14 which is pivotally carried on a shaft 15. The ends of the said shaft15 are received in bearing members 16, which, as

will be clear from Figs. 2, 3 and 4. are elongated, and are pivoted as at 17 to theframe 10. As will be clear from the drawings, the pivots 17 are, disposed in a plane above the shaft 15, and the said members 16 as well as the shaft 15 are therefore pendently mounted.

The skip. 13 is provided at its sides with rollers or projections 18, which are adapted to engage with cams or lugs 19 formed u on or secured to the drip ring 20 of the mix ng drum 11. Obviously the rollers 18 will only contact with the cams or lugs 19 when the skip is in its raised or discharging position indicated in dotted lines in Fig. 1. The lower ends of the bearing members 16 are preferably enlarged as indicated at 21, and form heads which normally engage against the longitudinal frame member 22to limit the pendent movement of the member 16 in one direction.

The operation of the device will be clear from the foregoing, but may be briefly summarized as follows:

When the skip bearing the charge of aggrega'tes is raised from its fullline position in course as the rollers ride up the inclined face of the cams 19 the parts will assume the positions shown. in Fig. 4. As the cams 19 pass from beneath the rollers, due to the continued rotation'of the drum, the pendent mounting of the skip will cause the parts to drop bac to the position shown in Fig. 3, with the result that when the head 21 of the bearing members 16 strikes the frame member 22 the skip will be jarred, thereby facilitating the discharge of aggregates into the drum.

While only two cams or lugs 19 have been shown upon the drip ring 20, obviously a greater number may be employed soas to cause a greater number of vibrations for each rotation of the drum.

While one form of the invention has been illustrated and described it is obvious that those skilled in the art may vary the details of construction as well as the arrangement of parts without de arting from the spirit of the invention, an therefore it is not wished to be limited to the above disclosure except as may be required by the claims.

What, is claimed is:

1. In a concrete mixer, a rotatable mixing drum; a pivoted charging skip, movable from a-load-receiving position to a load-discharging position in proximity to said drum; and means operable from said drum for vibrating saidskip when in said load discharging position.

2. In a concrete mixer having a mixing tion to said cam surfaces when the skip is raised to discharging position, whereby movement may be imparted to the skip and hearing members, the free ends of said bearing members engaginga portion ofsaid frame to limit movement thereof in one direction.

In testimony whereof I aflix my si ature.

' SAMUEL SHAFE -,JR.

drum and a pivotedchargin skip therefor,

a pendent mounting for said s 'p; and means operable from said mixing drum for swinging said skip on its pendent mounting to facilitate the discharge of materials from said skip into said drum.

3. In a concrete mixe a rotatable mixing drum provided with a pr jection a charging skipfor said drum, pivotally and pendently mounted relative thereto; and means carried by said skip adapted to coact with said .pro-

jection as said drum is rotated to move said I skipon its pendent mountingf 4. In a concrete mixer, a rotatable mixing drum having a drip ring; a plurality of projections carried by said drip ring; a chargmg skip for said drum, pivotally and pendently mounted relative thereto; and rollers carried by said skip adapted to he brought into the path of said proiections when the skip is swung on its pivota mounting to dis-. charge posit1on,.whereby movement may be ment imparted to said skip on its pendent mountmg, v

5. In a concrete mixer, a frame; a mixing drum rotatabl mountedin said frame, provided with a plurality of 0am surfaces; a (pair of bearingmembers pendently mounte on said frame; a charging skip for said drum said pendent bearing members; and mem rs carried by said skip adapted to be brought into co-operative rela- ;tion'to said .cam surfaces when the skip is raised to discharging position, whereby move: magebe imparted to the skip and bearmgmem rs.

6. In a concrete mixer, a frame; a'mixin'g drum rotatabl mounted in saidframe, provided with a p urality of cam surfaces a air of bearing members pendentl mounte on said frame; a charging skip or said drum pivotally carried by said pendentbe'aring members; and members carried .by said skip adapted'to be brought into oo-operative rela- 

